A Single Certificate in Pakistan is a document that shows a person is not married. People often need it for marriage in another country, visa work, or legal papers. The Single Certificate process is easy. You fill out the Single Certificate application, give a copy of your CNIC, and submit an affidavit. The Single Certificate fees and cost are different in each city but usually not very expensive. In some places, you can also use the Single Certificate online service to make the procedure simple and quick.